
B–64112EN/01
13. FUNCTIONS TO SIMPLIFY
PROGRAMMING
NC FUNCTION
149
The plunge direct grinding cycle is possible by the following command.
G77 I_ J_ K_ X(Z)_ R_ F_ P_ L_ ;
The command method is the same as the G75 case except for the G code.
Further, even for the operation, the same sequence of 6 operations as the
G75 case is repeated.
G77 differs from G75 as follows: Inputting a skip signal during a cycle
can terminate the cycle after stopping (or terminating) the current
operation sequence.
The following shows the operation at skip signal input for each operation
sequence.
Cutting immediately stops and returns to X(Z) coordinate at cycle start.
Skip signal
Skip signal
(Stopping)(Stopping)
(Stopping)
Skip signal
Dwell immediately stops and returns to X(Z) coordinate at cycle start.
After shift of X(Z) has finished, returns to X(Z) coordinate at cycle start.
(Stopping)
Skip signal
(Stopping)
Skip signal
13.13.2
Plunge Direct Grinding
Cycle (G77)
Format
Explanations
D Case of during operation
sequence and
(when I and J shift)
D Case of during operation
sequence and
(during dwell)
D Case of during operation
sequence and
(when X(Z) shifts)